Recherche avancée

Sur d’autres sites (8387)

• Picture size 0x0 is invalid : trying to downsample 4k raw video into 1080 using ffmpeg

  25 février 2021, par neetu sigger

  ffmpeg -i CityAlley_3840x2160_50fps_8bit.yuv -vf scale=1920:1080 CityAlly.yuv


  


  But I got the error :

  


  ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[IMGUTILS @ 0x7fffc0509b50] Picture size 0x0 is invalid
CityAlley_3840x2160_50fps_8bit.yuv: Invalid argument


  


• sw_scale : Add specializations for hscale 8 to 19

  28 octobre 2022, par Hubert Mazur

  sw_scale : Add specializations for hscale 8 to 19
  Add arm64 neon implementations for hscale 8 to 19 with filter
  
  sizes 4, 4X and 8. Both implementations are based on very similar ones
  
  dedicated to hscale 8 to 15. The major changes refer to saving
  
  the data - instead of writing the result as int16_t it is done
  
  with int32_t.
  These functions are heavily inspired on patches provided by J. Swinney
  
  and M. Storsjö for hscale8to15 which were slightly adapted for
  
  hscale8to19.
  The tests and benchmarks run on AWS Graviton 2 instances. The results
  
  from a checkasm tool shown below.
  hscale_8_to_19__fs_4_dstW_512_c : 5663.2
  
  hscale_8_to_19__fs_4_dstW_512_neon : 1259.7
  
  hscale_8_to_19__fs_8_dstW_512_c : 9306.0
  
  hscale_8_to_19__fs_8_dstW_512_neon : 2020.2
  
  hscale_8_to_19__fs_12_dstW_512_c : 12932.7
  
  hscale_8_to_19__fs_12_dstW_512_neon : 2462.5
  
  hscale_8_to_19__fs_16_dstW_512_c : 16844.2
  
  hscale_8_to_19__fs_16_dstW_512_neon : 4671.2
  
  hscale_8_to_19__fs_32_dstW_512_c : 32803.7
  
  hscale_8_to_19__fs_32_dstW_512_neon : 5474.2
  
  hscale_8_to_19__fs_40_dstW_512_c : 40948.0
  
  hscale_8_to_19__fs_40_dstW_512_neon : 6669.7
  Signed-off-by : Hubert Mazur <hum@semihalf.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libswscale/aarch64/hscale.S
  • [DH] libswscale/aarch64/swscale.c

• avformat/movenc : write the colr atom by default

  13 avril 2020, par Michael Bradshaw

  avformat/movenc : write the colr atom by default
  The write_colr flag has been marked as experimental for over 5 years.
  
  It should be safe to enable its behavior by default as follows :
    - Write the colr atom by default for mp4/mov if any of the following :
  
       - The primaries/trc/matrix are all specified, OR
  
       - There is an ICC profile, OR
  
       - The user specified +write_colr
  
    - Keep the write_colr flag for situations where the user wants to
  
      write the colr atom even if the color info is unspecified (e.g.,
  
      http://ffmpeg.org/pipermail/ffmpeg-devel/2020-March/259334.html)
  This fixes https://trac.ffmpeg.org/ticket/7961
  Signed-off-by : Michael Bradshaw <mjbshaw@google.com>
  

  • [DH] libavformat/movenc.c
  • [DH] tests/ref/fate/copy-trac236